Enhanced safety, improved visibility, and easier cleaning
De Dietrich’s fused-glass manhole and handhole covers provide maximum chemical resistance, enhanced durability, and superior process visibility for glass-lined reactors and vessels. By eliminating gaskets and seamlessly integrating soda-lime glass DIN 8902 with glass-lined steel, these covers improve safety, prevent leaks, and simplify cleaning.
Designed for chemical and pharmaceutical industries, they ensure uninterrupted optical monitoring of processes, while the option for nickel coating offers additional protection against contamination risks.
Performance & Safety
Higher mechanical and thermal shock resistance than conventional sight glasses
Superior fracture resistance – Remains tight even in case of cracks
No risk of leaks – Glass is fused into the lining, eliminating the need for gaskets
Excellent corrosion protection – Ensures longevity and chemical compatibility
Clearer monitoring with zero contamination risk
With superior scratch resistance and an unobstructed viewing diameter, these covers enable clear, precise process monitoring. The absence of gaskets eliminates dead zones, allowing easier cleaning and reducing cross-contamination risks, making them ideal for pharmaceutical and fine chemical applications.
Key Applications
Glass-lined reactor manhole and handhole covers
Process monitoring in pharmaceutical and fine chemical production
Equipment upgrade for leak-proof and contamination-free operation
High-purity applications requiring easy-to-clean surfaces
For industries requiring the highest purity standards
For pharmaceutical and fine chemical manufacturers, avoiding contaminants like paint chips is critical. Nickel coating provides enhanced durability, impact resistance, and superior surface quality (Ra <1.6µm), ensuring cleaner operations and long-term reliability.
Looking for enhanced safety and contamination-free operation?
Our teams are ready to help you!